7664789531 has 4 divisors (see below), whose sum is σ = 8759759472. Its totient is φ = 6569819592.

The previous prime is 7664789521. The next prime is 7664789549. The reversal of 7664789531 is 1359874667.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 7664789531 - 2⁶ = 7664789467 is a prime.

It is a super-2 number, since 2×7664789531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7664789521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547484960 + ... + 547484973.

It is an arithmetic number, because the mean of its divisors is an integer number (2189939868).

Almost surely, 2^7664789531 is an apocalyptic number.

7664789531 is a deficient number, since it is larger than the sum of its proper divisors (1094969941).

7664789531 is a wasteful number, since it uses less digits than its factorization.

7664789531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094969940.

The product of its digits is 7620480, while the sum is 56.

The square root of 7664789531 is about 87548.7837208490. The cubic root of 7664789531 is about 1971.6662902181. Note that the first 3 decimals are identical.

The spelling of 7664789531 in words is "seven billion, six hundred sixty-four million, seven hundred eighty-nine thousand, five hundred thirty-one".